Idon't see where reusing someone's clips is THAT Big of a deal, because, especially in shorter clips like Chrono Trigger for PSX, people are all going to end up using the same clips anyway, whether they exported them or not... I could see where a few people would get pretty POed however.

1) I think you'll get blasted for low video quality, since the video will be compressed and then compressed again. Not as flame-baiting as using stuff with logos in the corner, but still... people are very picky. Do what you like, but be aware of the blasts of hate coming your way.